“…In the framework of trade models with heterogeneous firms (Chaney, 2008), this outcome is consistent with an increase in fixed rather than variable export costs, and justifies interpreting the imposition of new TBTs as an increase in fixed export costs. While TBTs arguably raise fixed export cost, other NTMs, such as Sanitary and Phyto-Sanitary or the Pre-Shipment Inspection measures represent a mix of fixed and variable export cost (see Fontagné et al, 2015;2020), and therefore are less likely to affect firms' skill intensity. TBTs differ from Sanitary and Phyto-Sanitary measures (SPS) as the former relate to technical standard of mainly manufacturing products, while the latter concern mainly food and agri-food product and their ingredient composition (contents of pesticides, ingredient mix, etc.).…”